Brachial Plexus Flashcards Preview

MSK - Upper Limb > Brachial Plexus > Flashcards

Flashcards in Brachial Plexus Deck (18):
1

What is the purpose of the brachial plexus?

to provide motor, sensory, and sympathetic innervation to the upper limb

2

What is the brachial plexus composed of?

the ventral rami of the spinal nerves C5-T1

3

How does the brachial plexus pass from the neck and upper thorax to the upper limb?

cervioaxillary canal

4

What innervates pectoralis major?

medial and lateral pectoral nerves

5

What innervates the anterior compartment of the arm?

musculocutaneous nerve (C5, 6, 7)

6

What provides innervation to pectoralis minor?

medial pectoral nerve

7

what is the terminal branch of the medial cord?

ulnar nerve (C8, T1)

8

the brachial plexus cords are named in regards to their relation to what structure?

axillary artery

9

What nerve from the posterior cord innervates the subscapularis?

upper subscapular nerve

10

what nerve from the posterior cord innervates the latissimus dorsi?

thoracodorsal n.

11

what nerve from the posterior cord innervates subscapularis and teres major?

lower subscapular nerve

12

What nerve specifically innervates the deltoid and teres minor?

axillary n. (C5, C6)

13

Which nerve innervates most ventral antebrachial muscles as well as the thenar muscles of the hand?

median nerve (C6-T1)

14

What nerves form the supraclavicular branches?

dorsal scapular n. - (C5) levator scapulae, rhomboid major and minor

suprascapular n. - (C5, C6) supra/infraspinatus

nerve to subclavius - (C5,6) subclavius

long thoracic n. - (C5,6,7) serratus anterior

15

What nerves come off the medial cord?

medial pectoral, meidal brachial cutaneous, medial antebrachial cutaneous

16

What nerves come off the lateral cord?

lateral pectoral, musculocutaneous

17

what nerves come off the posterior cord?

upper subscapular, thoracodorsal, lower sub scapular, axillary, radial

18

What nerve innervates all muscles of the dorsal surface of the upper limb?

radial nerve